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In page Korean Air:

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Korean Air currently offers three types of first class, four types of business (Prestige) class, and standard economy class.[1] Korean Air operates First Class on all of its Airbus A380-800s, Boeing 747-8Is and 777-200ERs, and part of its Boeing 777-300ER fleet. Some seats are equipped as suites with doors.[citation needed] The airline markets Business Class as "Prestige Class", with some aircraft equipped with suites.[citation needed] The airline announced its introduction of Premium Economy in 2017.[2] The first aircraft equipped with premium economy marketed as "Economy Plus" was CS300 (Airbus A220-300).[3] The product was eliminated in 2019 due to discordance of service and profit loss.[4][5] The airline also offers Economy Class.